Vibratory movement



e. ALLEN. VIBRATORY MOVEMENT. APPLICATION FILED JAN- I9 I918- Patented Aug. 3, 1920.

H INVENTOR UNITED STATES PATENT OFFICE.

GUY L. ALLEN, F BOULDER, COLORADO, ASSIGNOR 0F ONE-HALF .ro JOHN G. CLARK,

' 0F BOULDER, COLORADO.

. VIBRATORY MOVEMENT.

Application filed January 19, 1918.

To all whom it may concern:

ments, and its primary object resides in the.

provision of a mechanism of simple construction which by its connection with a suitable source of motive power, imparts a very rapid and substantially uniform vibratory movement to a resiliently supported body.

My invention is particularly adapted for use in connection with screens, concentrating tables and other similar devices used in the separation and classification of finely divided materials, and it is distinguished from other apparatus of a similar character by the rapidity and uniformity of vibration attained with a minimum expenditure of motive power.

\Vith the above and other objects in view, all of which will fully appear in the course of the following description, my improved movement comprises in its preferred form, a-shaft or equivalent element mounted for rotation on a resiliently supported body and provided with unbalanced weights which in the rotary movement of the shaft imparts to said body a rapid elliptical vibratory motion which operates to sift, sort or otherwise effect a mass of material supported thereon.

In the accompanying drawings I have, as an example, shown my invention as applied to a screen of the character used in si ting ores, v

Figure 1 representing a plan view thereof,

Fig. 2, a section along the line 2-2, Fig. 1, and

F ig. 3, .a transverse section along the line 3-3, Fig. 2.

In the drawings in which like numerals of reference refer to similar parts in the several views, the reference character 2 designates a screen which is mounted for elliptical vibration upon a combination of normally horizontal and vertical springs 3 and 4.

The horizontal springs 3, of which there I are two, extend at opposite sides of the screen so that it is capable of moving between them. Each of the springs 3 is supported upon two normally upright springs 4 which are securely fastened upon a suit- Specification of Letters Patent.

Patented Aug. 3, 1920.

Serial NO. 212,643.

able foundation 5 and each horizontal spring has at its ends oppositely extending segmental arms (5 to which the screen is adjustably attached by means of bolts 7 or other smtable fastening devices.

The screen is tiltably mounted upon the two horizontal springs by means of a central hinge-joint 8 and the arms are provided with a number of sets of bolt-openings 9 to secure the screen in its adjusted positions in any one of a number of determinate angles of inclination.

The mechanism by which a vibratory motion is imparted to the screen, comprises a shaft 10 which is rotatably supported in boxes 12 at opposite sides thereof.

The shaft is provided with a pulley 13 for its connection with a conveniently located source of motive power through the intervention of a belt 1 1, and it carries at opposite sides of said pulley, eccentric disks 15 which constitute the unbalanced weights by which the vibratory motion is produced.

It will be readily seen that during rotation of the shaft in the direction of the arrow in Fig. 2, the eccentric weights in moving about the center of motion, impart a succession of short longitudinal movements to the screen which are absorbed by the flexing springs. The rebound of the springs compels the screen to move in the opposite clii'ection and a rapid vibratory motion is thus obtained.

While I have shown the movement in the best and simplest form at present known to me, it will be understood that variations in the construction and arrangement of its parts are possible without departing from the spirit of my invention.

' It will furthermore be seen that the movement is applicable to any device in which a rapid vibratory motion is required and that while it is particularly adapted for use in connection with a screen of thecharacter shown in the drawings, it is of equal value for use on concentrating tables since the movement of theunbalanced weights on the rotary shaft tends to move particles of material upon'the table, by intermittent impulses toward one end thereof.

Having thus described my invention what I claim and desire to secure by Letters-Patent is:

1. The combination of springs capable of swinging in opposite directions from perpendiculars passing through fixed points of support, horizontal springs mounted on the others, a body carried on the horizontal springs, and an unbalanced weight rotating about a fixed center of motion on the body.

2. The combination of springs capable of swinging in opposite directions from perpeudiculars passing through fixed points of support, horizontal springs mounted on the others, a body tiltably carried on the horizontal springs, and an unbalanced Weight ro- 10 tilting about a fixed center of motion on the body.

In testimony whereof I have aflixed my signature in presence of two Witnesses.

GUY L. ALLEN. Witnesses G. J. ROLLANDET, L. RHoADns. 

